d07f3037e2
Fix bug where pam_u2f options would be partially included in other pam.d files if the module was enable for specific services, resulting in broken configuration.
1279 lines
47 KiB
Nix
1279 lines
47 KiB
Nix
# This module provides configuration for the PAM (Pluggable
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# Authentication Modules) system.
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{ config, lib, pkgs, ... }:
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with lib;
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let
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parentConfig = config;
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pamOpts = { config, name, ... }: let cfg = config; in let config = parentConfig; in {
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options = {
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name = mkOption {
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example = "sshd";
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type = types.str;
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description = "Name of the PAM service.";
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};
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unixAuth = mkOption {
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default = true;
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type = types.bool;
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description = ''
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Whether users can log in with passwords defined in
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<filename>/etc/shadow</filename>.
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'';
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};
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rootOK = mkOption {
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default = false;
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type = types.bool;
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description = ''
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If set, root doesn't need to authenticate (e.g. for the
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<command>useradd</command> service).
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'';
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};
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p11Auth = mkOption {
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default = config.security.pam.p11.enable;
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defaultText = literalExpression "config.security.pam.p11.enable";
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type = types.bool;
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description = ''
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If set, keys listed in
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<filename>~/.ssh/authorized_keys</filename> and
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<filename>~/.eid/authorized_certificates</filename>
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can be used to log in with the associated PKCS#11 tokens.
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'';
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};
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u2fAuth = mkOption {
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default = config.security.pam.u2f.enable;
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defaultText = literalExpression "config.security.pam.u2f.enable";
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type = types.bool;
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description = ''
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If set, users listed in
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<filename>$XDG_CONFIG_HOME/Yubico/u2f_keys</filename> (or
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<filename>$HOME/.config/Yubico/u2f_keys</filename> if XDG variable is
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not set) are able to log in with the associated U2F key. Path can be
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changed using <option>security.pam.u2f.authFile</option> option.
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'';
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};
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usshAuth = mkOption {
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default = false;
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type = types.bool;
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description = ''
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If set, users with an SSH certificate containing an authorized principal
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in their SSH agent are able to log in. Specific options are controlled
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using the <option>security.pam.ussh</option> options.
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Note that the <option>security.pam.ussh.enable</option> must also be
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set for this option to take effect.
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'';
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};
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yubicoAuth = mkOption {
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default = config.security.pam.yubico.enable;
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defaultText = literalExpression "config.security.pam.yubico.enable";
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type = types.bool;
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description = ''
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If set, users listed in
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<filename>~/.yubico/authorized_yubikeys</filename>
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are able to log in with the associated Yubikey tokens.
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'';
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};
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googleAuthenticator = {
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enable = mkOption {
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default = false;
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type = types.bool;
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description = ''
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If set, users with enabled Google Authenticator (created
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<filename>~/.google_authenticator</filename>) will be required
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to provide Google Authenticator token to log in.
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'';
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};
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};
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usbAuth = mkOption {
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default = config.security.pam.usb.enable;
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defaultText = literalExpression "config.security.pam.usb.enable";
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type = types.bool;
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description = ''
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If set, users listed in
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<filename>/etc/pamusb.conf</filename> are able to log in
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with the associated USB key.
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'';
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};
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otpwAuth = mkOption {
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default = config.security.pam.enableOTPW;
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defaultText = literalExpression "config.security.pam.enableOTPW";
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type = types.bool;
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description = ''
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If set, the OTPW system will be used (if
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<filename>~/.otpw</filename> exists).
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'';
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};
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googleOsLoginAccountVerification = mkOption {
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default = false;
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type = types.bool;
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description = ''
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If set, will use the Google OS Login PAM modules
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(<literal>pam_oslogin_login</literal>,
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<literal>pam_oslogin_admin</literal>) to verify possible OS Login
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users and set sudoers configuration accordingly.
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This only makes sense to enable for the <literal>sshd</literal> PAM
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service.
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'';
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};
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googleOsLoginAuthentication = mkOption {
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default = false;
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type = types.bool;
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description = ''
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If set, will use the <literal>pam_oslogin_login</literal>'s user
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authentication methods to authenticate users using 2FA.
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This only makes sense to enable for the <literal>sshd</literal> PAM
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service.
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'';
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};
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fprintAuth = mkOption {
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default = config.services.fprintd.enable;
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defaultText = literalExpression "config.services.fprintd.enable";
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type = types.bool;
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description = ''
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If set, fingerprint reader will be used (if exists and
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your fingerprints are enrolled).
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'';
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};
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oathAuth = mkOption {
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default = config.security.pam.oath.enable;
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defaultText = literalExpression "config.security.pam.oath.enable";
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type = types.bool;
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description = ''
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If set, the OATH Toolkit will be used.
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'';
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};
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sshAgentAuth = mkOption {
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default = false;
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type = types.bool;
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description = ''
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If set, the calling user's SSH agent is used to authenticate
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against the keys in the calling user's
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<filename>~/.ssh/authorized_keys</filename>. This is useful
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for <command>sudo</command> on password-less remote systems.
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'';
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};
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duoSecurity = {
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enable = mkOption {
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default = false;
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type = types.bool;
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description = ''
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If set, use the Duo Security pam module
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<literal>pam_duo</literal> for authentication. Requires
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configuration of <option>security.duosec</option> options.
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'';
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};
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};
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startSession = mkOption {
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default = false;
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type = types.bool;
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description = ''
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If set, the service will register a new session with
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systemd's login manager. For local sessions, this will give
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the user access to audio devices, CD-ROM drives. In the
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default PolicyKit configuration, it also allows the user to
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reboot the system.
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'';
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};
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setEnvironment = mkOption {
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type = types.bool;
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default = true;
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description = ''
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Whether the service should set the environment variables
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listed in <option>environment.sessionVariables</option>
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using <literal>pam_env.so</literal>.
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'';
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};
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setLoginUid = mkOption {
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type = types.bool;
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description = ''
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Set the login uid of the process
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(<filename>/proc/self/loginuid</filename>) for auditing
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purposes. The login uid is only set by ‘entry points’ like
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<command>login</command> and <command>sshd</command>, not by
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commands like <command>sudo</command>.
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'';
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};
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ttyAudit = {
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enable = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Enable or disable TTY auditing for specified users
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'';
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};
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enablePattern = mkOption {
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type = types.nullOr types.str;
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default = null;
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description = ''
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For each user matching one of comma-separated
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glob patterns, enable TTY auditing
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'';
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};
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disablePattern = mkOption {
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type = types.nullOr types.str;
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default = null;
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description = ''
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For each user matching one of comma-separated
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glob patterns, disable TTY auditing
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'';
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};
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openOnly = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Set the TTY audit flag when opening the session,
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but do not restore it when closing the session.
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Using this option is necessary for some services
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that don't fork() to run the authenticated session,
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such as sudo.
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'';
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};
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};
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forwardXAuth = mkOption {
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default = false;
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type = types.bool;
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description = ''
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Whether X authentication keys should be passed from the
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calling user to the target user (e.g. for
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<command>su</command>)
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'';
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};
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pamMount = mkOption {
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default = config.security.pam.mount.enable;
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defaultText = literalExpression "config.security.pam.mount.enable";
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type = types.bool;
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description = ''
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Enable PAM mount (pam_mount) system to mount fileystems on user login.
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'';
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};
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allowNullPassword = mkOption {
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default = false;
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type = types.bool;
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description = ''
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Whether to allow logging into accounts that have no password
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set (i.e., have an empty password field in
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<filename>/etc/passwd</filename> or
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<filename>/etc/group</filename>). This does not enable
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logging into disabled accounts (i.e., that have the password
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field set to <literal>!</literal>). Note that regardless of
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what the pam_unix documentation says, accounts with hashed
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empty passwords are always allowed to log in.
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'';
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};
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nodelay = mkOption {
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default = false;
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type = types.bool;
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description = ''
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Wheather the delay after typing a wrong password should be disabled.
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'';
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};
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requireWheel = mkOption {
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default = false;
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type = types.bool;
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description = ''
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Whether to permit root access only to members of group wheel.
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'';
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};
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limits = mkOption {
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default = [];
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type = limitsType;
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description = ''
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Attribute set describing resource limits. Defaults to the
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value of <option>security.pam.loginLimits</option>.
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The meaning of the values is explained in <citerefentry>
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<refentrytitle>limits.conf</refentrytitle><manvolnum>5</manvolnum>
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</citerefentry>.
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'';
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};
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showMotd = mkOption {
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default = false;
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type = types.bool;
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description = "Whether to show the message of the day.";
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};
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makeHomeDir = mkOption {
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default = false;
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type = types.bool;
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description = ''
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Whether to try to create home directories for users
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with <literal>$HOME</literal>s pointing to nonexistent
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locations on session login.
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'';
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};
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updateWtmp = mkOption {
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default = false;
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type = types.bool;
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description = "Whether to update <filename>/var/log/wtmp</filename>.";
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};
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logFailures = mkOption {
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default = false;
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type = types.bool;
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description = "Whether to log authentication failures in <filename>/var/log/faillog</filename>.";
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};
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enableAppArmor = mkOption {
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default = false;
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type = types.bool;
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description = ''
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Enable support for attaching AppArmor profiles at the
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user/group level, e.g., as part of a role based access
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control scheme.
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'';
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};
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enableKwallet = mkOption {
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default = false;
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type = types.bool;
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description = ''
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If enabled, pam_wallet will attempt to automatically unlock the
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user's default KDE wallet upon login. If the user has no wallet named
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"kdewallet", or the login password does not match their wallet
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password, KDE will prompt separately after login.
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'';
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};
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sssdStrictAccess = mkOption {
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default = false;
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type = types.bool;
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description = "enforce sssd access control";
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};
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enableGnomeKeyring = mkOption {
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default = false;
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type = types.bool;
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description = ''
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If enabled, pam_gnome_keyring will attempt to automatically unlock the
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user's default Gnome keyring upon login. If the user login password does
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not match their keyring password, Gnome Keyring will prompt separately
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after login.
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'';
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};
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gnupg = {
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enable = mkOption {
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type = types.bool;
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default = false;
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description = ''
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If enabled, pam_gnupg will attempt to automatically unlock the
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user's GPG keys with the login password via
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<command>gpg-agent</command>. The keygrips of all keys to be
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unlocked should be written to <filename>~/.pam-gnupg</filename>,
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and can be queried with <command>gpg -K --with-keygrip</command>.
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Presetting passphrases must be enabled by adding
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<literal>allow-preset-passphrase</literal> in
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<filename>~/.gnupg/gpg-agent.conf</filename>.
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'';
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};
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noAutostart = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Don't start <command>gpg-agent</command> if it is not running.
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Useful in conjunction with starting <command>gpg-agent</command> as
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a systemd user service.
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'';
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};
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storeOnly = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Don't send the password immediately after login, but store for PAM
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<literal>session</literal>.
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'';
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};
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};
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text = mkOption {
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type = types.nullOr types.lines;
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description = "Contents of the PAM service file.";
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};
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};
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# The resulting /etc/pam.d/* file contents are verified in
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# nixos/tests/pam/pam-file-contents.nix. Please update tests there when
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# changing the derivation.
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config = {
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name = mkDefault name;
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setLoginUid = mkDefault cfg.startSession;
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limits = mkDefault config.security.pam.loginLimits;
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# !!! TODO: move the LDAP stuff to the LDAP module, and the
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# Samba stuff to the Samba module. This requires that the PAM
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# module provides the right hooks.
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text = mkDefault
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(
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''
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# Account management.
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account required pam_unix.so
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'' +
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optionalString use_ldap ''
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account sufficient ${pam_ldap}/lib/security/pam_ldap.so
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'' +
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optionalString (config.services.sssd.enable && cfg.sssdStrictAccess==false) ''
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account sufficient ${pkgs.sssd}/lib/security/pam_sss.so
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'' +
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optionalString (config.services.sssd.enable && cfg.sssdStrictAccess) ''
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account [default=bad success=ok user_unknown=ignore] ${pkgs.sssd}/lib/security/pam_sss.so
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'' +
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optionalString config.krb5.enable ''
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account sufficient ${pam_krb5}/lib/security/pam_krb5.so
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'' +
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optionalString cfg.googleOsLoginAccountVerification ''
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account [success=ok ignore=ignore default=die] ${pkgs.google-guest-oslogin}/lib/security/pam_oslogin_login.so
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account [success=ok default=ignore] ${pkgs.google-guest-oslogin}/lib/security/pam_oslogin_admin.so
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'' +
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''
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# Authentication management.
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'' +
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optionalString cfg.googleOsLoginAuthentication ''
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auth [success=done perm_denied=die default=ignore] ${pkgs.google-guest-oslogin}/lib/security/pam_oslogin_login.so
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'' +
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optionalString cfg.rootOK ''
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auth sufficient pam_rootok.so
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'' +
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optionalString cfg.requireWheel ''
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auth required pam_wheel.so use_uid
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'' +
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optionalString cfg.logFailures ''
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auth required pam_faillock.so
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'' +
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optionalString (config.security.pam.enableSSHAgentAuth && cfg.sshAgentAuth) ''
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auth sufficient ${pkgs.pam_ssh_agent_auth}/libexec/pam_ssh_agent_auth.so file=${lib.concatStringsSep ":" config.services.openssh.authorizedKeysFiles}
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'' +
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(let p11 = config.security.pam.p11; in optionalString cfg.p11Auth ''
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auth ${p11.control} ${pkgs.pam_p11}/lib/security/pam_p11.so ${pkgs.opensc}/lib/opensc-pkcs11.so
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'') +
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(let u2f = config.security.pam.u2f; in optionalString cfg.u2fAuth (''
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auth ${u2f.control} ${pkgs.pam_u2f}/lib/security/pam_u2f.so ${optionalString u2f.debug "debug"} ${optionalString (u2f.authFile != null) "authfile=${u2f.authFile}"} ''
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+ ''${optionalString u2f.interactive "interactive"} ${optionalString u2f.cue "cue"} ${optionalString (u2f.appId != null) "appid=${u2f.appId}"} ${optionalString (u2f.origin != null) "origin=${u2f.origin}"}
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'')) +
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optionalString cfg.usbAuth ''
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auth sufficient ${pkgs.pam_usb}/lib/security/pam_usb.so
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'' +
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(let ussh = config.security.pam.ussh; in optionalString (config.security.pam.ussh.enable && cfg.usshAuth) ''
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auth ${ussh.control} ${pkgs.pam_ussh}/lib/security/pam_ussh.so ${optionalString (ussh.caFile != null) "ca_file=${ussh.caFile}"} ${optionalString (ussh.authorizedPrincipals != null) "authorized_principals=${ussh.authorizedPrincipals}"} ${optionalString (ussh.authorizedPrincipalsFile != null) "authorized_principals_file=${ussh.authorizedPrincipalsFile}"} ${optionalString (ussh.group != null) "group=${ussh.group}"}
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'') +
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(let oath = config.security.pam.oath; in optionalString cfg.oathAuth ''
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auth requisite ${pkgs.oath-toolkit}/lib/security/pam_oath.so window=${toString oath.window} usersfile=${toString oath.usersFile} digits=${toString oath.digits}
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'') +
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(let yubi = config.security.pam.yubico; in optionalString cfg.yubicoAuth ''
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auth ${yubi.control} ${pkgs.yubico-pam}/lib/security/pam_yubico.so mode=${toString yubi.mode} ${optionalString (yubi.challengeResponsePath != null) "chalresp_path=${yubi.challengeResponsePath}"} ${optionalString (yubi.mode == "client") "id=${toString yubi.id}"} ${optionalString yubi.debug "debug"}
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'') +
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optionalString cfg.fprintAuth ''
|
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auth sufficient ${pkgs.fprintd}/lib/security/pam_fprintd.so
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'' +
|
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# Modules in this block require having the password set in PAM_AUTHTOK.
|
||
# pam_unix is marked as 'sufficient' on NixOS which means nothing will run
|
||
# after it succeeds. Certain modules need to run after pam_unix
|
||
# prompts the user for password so we run it once with 'required' at an
|
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# earlier point and it will run again with 'sufficient' further down.
|
||
# We use try_first_pass the second time to avoid prompting password twice
|
||
(optionalString (cfg.unixAuth &&
|
||
(config.security.pam.enableEcryptfs
|
||
|| cfg.pamMount
|
||
|| cfg.enableKwallet
|
||
|| cfg.enableGnomeKeyring
|
||
|| cfg.googleAuthenticator.enable
|
||
|| cfg.gnupg.enable
|
||
|| cfg.duoSecurity.enable))
|
||
(
|
||
''
|
||
auth required pam_unix.so ${optionalString cfg.allowNullPassword "nullok"} ${optionalString cfg.nodelay "nodelay"} likeauth
|
||
'' +
|
||
optionalString config.security.pam.enableEcryptfs ''
|
||
auth optional ${pkgs.ecryptfs}/lib/security/pam_ecryptfs.so unwrap
|
||
'' +
|
||
optionalString cfg.pamMount ''
|
||
auth optional ${pkgs.pam_mount}/lib/security/pam_mount.so disable_interactive
|
||
'' +
|
||
optionalString cfg.enableKwallet ''
|
||
auth optional ${pkgs.plasma5Packages.kwallet-pam}/lib/security/pam_kwallet5.so kwalletd=${pkgs.plasma5Packages.kwallet.bin}/bin/kwalletd5
|
||
'' +
|
||
optionalString cfg.enableGnomeKeyring ''
|
||
auth optional ${pkgs.gnome.gnome-keyring}/lib/security/pam_gnome_keyring.so
|
||
'' +
|
||
optionalString cfg.gnupg.enable ''
|
||
auth optional ${pkgs.pam_gnupg}/lib/security/pam_gnupg.so ${optionalString cfg.gnupg.storeOnly " store-only"}
|
||
'' +
|
||
optionalString cfg.googleAuthenticator.enable ''
|
||
auth required ${pkgs.google-authenticator}/lib/security/pam_google_authenticator.so no_increment_hotp
|
||
'' +
|
||
optionalString cfg.duoSecurity.enable ''
|
||
auth required ${pkgs.duo-unix}/lib/security/pam_duo.so
|
||
''
|
||
)) +
|
||
optionalString cfg.unixAuth ''
|
||
auth sufficient pam_unix.so ${optionalString cfg.allowNullPassword "nullok"} ${optionalString cfg.nodelay "nodelay"} likeauth try_first_pass
|
||
'' +
|
||
optionalString cfg.otpwAuth ''
|
||
auth sufficient ${pkgs.otpw}/lib/security/pam_otpw.so
|
||
'' +
|
||
optionalString use_ldap ''
|
||
auth sufficient ${pam_ldap}/lib/security/pam_ldap.so use_first_pass
|
||
'' +
|
||
optionalString config.services.sssd.enable ''
|
||
auth sufficient ${pkgs.sssd}/lib/security/pam_sss.so use_first_pass
|
||
'' +
|
||
optionalString config.krb5.enable ''
|
||
auth [default=ignore success=1 service_err=reset] ${pam_krb5}/lib/security/pam_krb5.so use_first_pass
|
||
auth [default=die success=done] ${pam_ccreds}/lib/security/pam_ccreds.so action=validate use_first_pass
|
||
auth sufficient ${pam_ccreds}/lib/security/pam_ccreds.so action=store use_first_pass
|
||
'' +
|
||
''
|
||
auth required pam_deny.so
|
||
|
||
# Password management.
|
||
password sufficient pam_unix.so nullok sha512
|
||
'' +
|
||
optionalString config.security.pam.enableEcryptfs ''
|
||
password optional ${pkgs.ecryptfs}/lib/security/pam_ecryptfs.so
|
||
'' +
|
||
optionalString cfg.pamMount ''
|
||
password optional ${pkgs.pam_mount}/lib/security/pam_mount.so
|
||
'' +
|
||
optionalString use_ldap ''
|
||
password sufficient ${pam_ldap}/lib/security/pam_ldap.so
|
||
'' +
|
||
optionalString config.services.sssd.enable ''
|
||
password sufficient ${pkgs.sssd}/lib/security/pam_sss.so use_authtok
|
||
'' +
|
||
optionalString config.krb5.enable ''
|
||
password sufficient ${pam_krb5}/lib/security/pam_krb5.so use_first_pass
|
||
'' +
|
||
optionalString cfg.enableGnomeKeyring ''
|
||
password optional ${pkgs.gnome.gnome-keyring}/lib/security/pam_gnome_keyring.so use_authtok
|
||
'' +
|
||
''
|
||
|
||
# Session management.
|
||
'' +
|
||
optionalString cfg.setEnvironment ''
|
||
session required pam_env.so conffile=/etc/pam/environment readenv=0
|
||
'' +
|
||
''
|
||
session required pam_unix.so
|
||
'' +
|
||
optionalString cfg.setLoginUid ''
|
||
session ${if config.boot.isContainer then "optional" else "required"} pam_loginuid.so
|
||
'' +
|
||
optionalString cfg.ttyAudit.enable ''
|
||
session required ${pkgs.pam}/lib/security/pam_tty_audit.so
|
||
open_only=${toString cfg.ttyAudit.openOnly}
|
||
${optionalString (cfg.ttyAudit.enablePattern != null) "enable=${cfg.ttyAudit.enablePattern}"}
|
||
${optionalString (cfg.ttyAudit.disablePattern != null) "disable=${cfg.ttyAudit.disablePattern}"}
|
||
'' +
|
||
optionalString cfg.makeHomeDir ''
|
||
session required ${pkgs.pam}/lib/security/pam_mkhomedir.so silent skel=${config.security.pam.makeHomeDir.skelDirectory} umask=0077
|
||
'' +
|
||
optionalString cfg.updateWtmp ''
|
||
session required ${pkgs.pam}/lib/security/pam_lastlog.so silent
|
||
'' +
|
||
optionalString config.security.pam.enableEcryptfs ''
|
||
session optional ${pkgs.ecryptfs}/lib/security/pam_ecryptfs.so
|
||
'' +
|
||
optionalString cfg.pamMount ''
|
||
session [success=1 default=ignore] ${pkgs.pam}/lib/security/pam_succeed_if.so service = systemd-user quiet
|
||
session optional ${pkgs.pam_mount}/lib/security/pam_mount.so disable_interactive
|
||
'' +
|
||
optionalString use_ldap ''
|
||
session optional ${pam_ldap}/lib/security/pam_ldap.so
|
||
'' +
|
||
optionalString config.services.sssd.enable ''
|
||
session optional ${pkgs.sssd}/lib/security/pam_sss.so
|
||
'' +
|
||
optionalString config.krb5.enable ''
|
||
session optional ${pam_krb5}/lib/security/pam_krb5.so
|
||
'' +
|
||
optionalString cfg.otpwAuth ''
|
||
session optional ${pkgs.otpw}/lib/security/pam_otpw.so
|
||
'' +
|
||
optionalString cfg.startSession ''
|
||
session optional ${config.systemd.package}/lib/security/pam_systemd.so
|
||
'' +
|
||
optionalString cfg.forwardXAuth ''
|
||
session optional pam_xauth.so xauthpath=${pkgs.xorg.xauth}/bin/xauth systemuser=99
|
||
'' +
|
||
optionalString (cfg.limits != []) ''
|
||
session required ${pkgs.pam}/lib/security/pam_limits.so conf=${makeLimitsConf cfg.limits}
|
||
'' +
|
||
optionalString (cfg.showMotd && config.users.motd != null) ''
|
||
session optional ${pkgs.pam}/lib/security/pam_motd.so motd=${motd}
|
||
'' +
|
||
optionalString (cfg.enableAppArmor && config.security.apparmor.enable) ''
|
||
session optional ${pkgs.apparmor-pam}/lib/security/pam_apparmor.so order=user,group,default debug
|
||
'' +
|
||
optionalString (cfg.enableKwallet) ''
|
||
session optional ${pkgs.plasma5Packages.kwallet-pam}/lib/security/pam_kwallet5.so kwalletd=${pkgs.plasma5Packages.kwallet.bin}/bin/kwalletd5
|
||
'' +
|
||
optionalString (cfg.enableGnomeKeyring) ''
|
||
session optional ${pkgs.gnome.gnome-keyring}/lib/security/pam_gnome_keyring.so auto_start
|
||
'' +
|
||
optionalString cfg.gnupg.enable ''
|
||
session optional ${pkgs.pam_gnupg}/lib/security/pam_gnupg.so ${optionalString cfg.gnupg.noAutostart " no-autostart"}
|
||
'' +
|
||
optionalString (config.virtualisation.lxc.lxcfs.enable) ''
|
||
session optional ${pkgs.lxc}/lib/security/pam_cgfs.so -c all
|
||
''
|
||
);
|
||
};
|
||
|
||
};
|
||
|
||
|
||
inherit (pkgs) pam_krb5 pam_ccreds;
|
||
|
||
use_ldap = (config.users.ldap.enable && config.users.ldap.loginPam);
|
||
pam_ldap = if config.users.ldap.daemon.enable then pkgs.nss_pam_ldapd else pkgs.pam_ldap;
|
||
|
||
# Create a limits.conf(5) file.
|
||
makeLimitsConf = limits:
|
||
pkgs.writeText "limits.conf"
|
||
(concatMapStrings ({ domain, type, item, value }:
|
||
"${domain} ${type} ${item} ${toString value}\n")
|
||
limits);
|
||
|
||
limitsType = with lib.types; listOf (submodule ({ ... }: {
|
||
options = {
|
||
domain = mkOption {
|
||
description = "Username, groupname, or wildcard this limit applies to";
|
||
example = "@wheel";
|
||
type = str;
|
||
};
|
||
|
||
type = mkOption {
|
||
description = "Type of this limit";
|
||
type = enum [ "-" "hard" "soft" ];
|
||
default = "-";
|
||
};
|
||
|
||
item = mkOption {
|
||
description = "Item this limit applies to";
|
||
type = enum [
|
||
"core"
|
||
"data"
|
||
"fsize"
|
||
"memlock"
|
||
"nofile"
|
||
"rss"
|
||
"stack"
|
||
"cpu"
|
||
"nproc"
|
||
"as"
|
||
"maxlogins"
|
||
"maxsyslogins"
|
||
"priority"
|
||
"locks"
|
||
"sigpending"
|
||
"msgqueue"
|
||
"nice"
|
||
"rtprio"
|
||
];
|
||
};
|
||
|
||
value = mkOption {
|
||
description = "Value of this limit";
|
||
type = oneOf [ str int ];
|
||
};
|
||
};
|
||
}));
|
||
|
||
motd = pkgs.writeText "motd" config.users.motd;
|
||
|
||
makePAMService = name: service:
|
||
{ name = "pam.d/${name}";
|
||
value.source = pkgs.writeText "${name}.pam" service.text;
|
||
};
|
||
|
||
in
|
||
|
||
{
|
||
|
||
imports = [
|
||
(mkRenamedOptionModule [ "security" "pam" "enableU2F" ] [ "security" "pam" "u2f" "enable" ])
|
||
];
|
||
|
||
###### interface
|
||
|
||
options = {
|
||
|
||
security.pam.loginLimits = mkOption {
|
||
default = [];
|
||
type = limitsType;
|
||
example =
|
||
[ { domain = "ftp";
|
||
type = "hard";
|
||
item = "nproc";
|
||
value = "0";
|
||
}
|
||
{ domain = "@student";
|
||
type = "-";
|
||
item = "maxlogins";
|
||
value = "4";
|
||
}
|
||
];
|
||
|
||
description =
|
||
'' Define resource limits that should apply to users or groups.
|
||
Each item in the list should be an attribute set with a
|
||
<varname>domain</varname>, <varname>type</varname>,
|
||
<varname>item</varname>, and <varname>value</varname>
|
||
attribute. The syntax and semantics of these attributes
|
||
must be that described in <citerefentry><refentrytitle>limits.conf</refentrytitle>
|
||
<manvolnum>5</manvolnum></citerefentry>.
|
||
|
||
Note that these limits do not apply to systemd services,
|
||
whose limits can be changed via <option>systemd.extraConfig</option>
|
||
instead.
|
||
'';
|
||
};
|
||
|
||
security.pam.services = mkOption {
|
||
default = {};
|
||
type = with types; attrsOf (submodule pamOpts);
|
||
description =
|
||
''
|
||
This option defines the PAM services. A service typically
|
||
corresponds to a program that uses PAM,
|
||
e.g. <command>login</command> or <command>passwd</command>.
|
||
Each attribute of this set defines a PAM service, with the attribute name
|
||
defining the name of the service.
|
||
'';
|
||
};
|
||
|
||
security.pam.makeHomeDir.skelDirectory = mkOption {
|
||
type = types.str;
|
||
default = "/var/empty";
|
||
example = "/etc/skel";
|
||
description = ''
|
||
Path to skeleton directory whose contents are copied to home
|
||
directories newly created by <literal>pam_mkhomedir</literal>.
|
||
'';
|
||
};
|
||
|
||
security.pam.enableSSHAgentAuth = mkOption {
|
||
type = types.bool;
|
||
default = false;
|
||
description =
|
||
''
|
||
Enable sudo logins if the user's SSH agent provides a key
|
||
present in <filename>~/.ssh/authorized_keys</filename>.
|
||
This allows machines to exclusively use SSH keys instead of
|
||
passwords.
|
||
'';
|
||
};
|
||
|
||
security.pam.enableOTPW = mkEnableOption "the OTPW (one-time password) PAM module";
|
||
|
||
security.pam.p11 = {
|
||
enable = mkOption {
|
||
default = false;
|
||
type = types.bool;
|
||
description = ''
|
||
Enables P11 PAM (<literal>pam_p11</literal>) module.
|
||
|
||
If set, users can log in with SSH keys and PKCS#11 tokens.
|
||
|
||
More information can be found <link
|
||
xlink:href="https://github.com/OpenSC/pam_p11">here</link>.
|
||
'';
|
||
};
|
||
|
||
control = mkOption {
|
||
default = "sufficient";
|
||
type = types.enum [ "required" "requisite" "sufficient" "optional" ];
|
||
description = ''
|
||
This option sets pam "control".
|
||
If you want to have multi factor authentication, use "required".
|
||
If you want to use the PKCS#11 device instead of the regular password,
|
||
use "sufficient".
|
||
|
||
Read
|
||
<citerefentry>
|
||
<refentrytitle>pam.conf</refentrytitle>
|
||
<manvolnum>5</manvolnum>
|
||
</citerefentry>
|
||
for better understanding of this option.
|
||
'';
|
||
};
|
||
};
|
||
|
||
security.pam.u2f = {
|
||
enable = mkOption {
|
||
default = false;
|
||
type = types.bool;
|
||
description = ''
|
||
Enables U2F PAM (<literal>pam-u2f</literal>) module.
|
||
|
||
If set, users listed in
|
||
<filename>$XDG_CONFIG_HOME/Yubico/u2f_keys</filename> (or
|
||
<filename>$HOME/.config/Yubico/u2f_keys</filename> if XDG variable is
|
||
not set) are able to log in with the associated U2F key. The path can
|
||
be changed using <option>security.pam.u2f.authFile</option> option.
|
||
|
||
File format is:
|
||
<literal>username:first_keyHandle,first_public_key: second_keyHandle,second_public_key</literal>
|
||
This file can be generated using <command>pamu2fcfg</command> command.
|
||
|
||
More information can be found <link
|
||
xlink:href="https://developers.yubico.com/pam-u2f/">here</link>.
|
||
'';
|
||
};
|
||
|
||
authFile = mkOption {
|
||
default = null;
|
||
type = with types; nullOr path;
|
||
description = ''
|
||
By default <literal>pam-u2f</literal> module reads the keys from
|
||
<filename>$XDG_CONFIG_HOME/Yubico/u2f_keys</filename> (or
|
||
<filename>$HOME/.config/Yubico/u2f_keys</filename> if XDG variable is
|
||
not set).
|
||
|
||
If you want to change auth file locations or centralize database (for
|
||
example use <filename>/etc/u2f-mappings</filename>) you can set this
|
||
option.
|
||
|
||
File format is:
|
||
<literal>username:first_keyHandle,first_public_key: second_keyHandle,second_public_key</literal>
|
||
This file can be generated using <command>pamu2fcfg</command> command.
|
||
|
||
More information can be found <link
|
||
xlink:href="https://developers.yubico.com/pam-u2f/">here</link>.
|
||
'';
|
||
};
|
||
|
||
appId = mkOption {
|
||
default = null;
|
||
type = with types; nullOr str;
|
||
description = ''
|
||
By default <literal>pam-u2f</literal> module sets the application
|
||
ID to <literal>pam://$HOSTNAME</literal>.
|
||
|
||
When using <command>pamu2fcfg</command>, you can specify your
|
||
application ID with the <literal>-i</literal> flag.
|
||
|
||
More information can be found <link
|
||
xlink:href="https://developers.yubico.com/pam-u2f/Manuals/pam_u2f.8.html">
|
||
here</link>
|
||
'';
|
||
};
|
||
|
||
origin = mkOption {
|
||
default = null;
|
||
type = with types; nullOr str;
|
||
description = ''
|
||
By default <literal>pam-u2f</literal> module sets the origin
|
||
to <literal>pam://$HOSTNAME</literal>.
|
||
Setting origin to an host independent value will allow you to
|
||
reuse credentials across machines
|
||
|
||
When using <command>pamu2fcfg</command>, you can specify your
|
||
application ID with the <literal>-o</literal> flag.
|
||
|
||
More information can be found <link
|
||
xlink:href="https://developers.yubico.com/pam-u2f/Manuals/pam_u2f.8.html">
|
||
here</link>
|
||
'';
|
||
};
|
||
|
||
control = mkOption {
|
||
default = "sufficient";
|
||
type = types.enum [ "required" "requisite" "sufficient" "optional" ];
|
||
description = ''
|
||
This option sets pam "control".
|
||
If you want to have multi factor authentication, use "required".
|
||
If you want to use U2F device instead of regular password, use "sufficient".
|
||
|
||
Read
|
||
<citerefentry>
|
||
<refentrytitle>pam.conf</refentrytitle>
|
||
<manvolnum>5</manvolnum>
|
||
</citerefentry>
|
||
for better understanding of this option.
|
||
'';
|
||
};
|
||
|
||
debug = mkOption {
|
||
default = false;
|
||
type = types.bool;
|
||
description = ''
|
||
Debug output to stderr.
|
||
'';
|
||
};
|
||
|
||
interactive = mkOption {
|
||
default = false;
|
||
type = types.bool;
|
||
description = ''
|
||
Set to prompt a message and wait before testing the presence of a U2F device.
|
||
Recommended if your device doesn’t have a tactile trigger.
|
||
'';
|
||
};
|
||
|
||
cue = mkOption {
|
||
default = false;
|
||
type = types.bool;
|
||
description = ''
|
||
By default <literal>pam-u2f</literal> module does not inform user
|
||
that he needs to use the u2f device, it just waits without a prompt.
|
||
|
||
If you set this option to <literal>true</literal>,
|
||
<literal>cue</literal> option is added to <literal>pam-u2f</literal>
|
||
module and reminder message will be displayed.
|
||
'';
|
||
};
|
||
};
|
||
|
||
security.pam.ussh = {
|
||
enable = mkOption {
|
||
default = false;
|
||
type = types.bool;
|
||
description = ''
|
||
Enables Uber's USSH PAM (<literal>pam-ussh</literal>) module.
|
||
|
||
This is similar to <literal>pam-ssh-agent</literal>, except that
|
||
the presence of a CA-signed SSH key with a valid principal is checked
|
||
instead.
|
||
|
||
Note that this module must both be enabled using this option and on a
|
||
per-PAM-service level as well (using <literal>usshAuth</literal>).
|
||
|
||
More information can be found <link
|
||
xlink:href="https://github.com/uber/pam-ussh">here</link>.
|
||
'';
|
||
};
|
||
|
||
caFile = mkOption {
|
||
default = null;
|
||
type = with types; nullOr path;
|
||
description = ''
|
||
By default <literal>pam-ussh</literal> reads the trusted user CA keys
|
||
from <filename>/etc/ssh/trusted_user_ca</filename>.
|
||
|
||
This should be set the same as your <literal>TrustedUserCAKeys</literal>
|
||
option for sshd.
|
||
'';
|
||
};
|
||
|
||
authorizedPrincipals = mkOption {
|
||
default = null;
|
||
type = with types; nullOr commas;
|
||
description = ''
|
||
Comma-separated list of authorized principals to permit; if the user
|
||
presents a certificate with one of these principals, then they will be
|
||
authorized.
|
||
|
||
Note that <literal>pam-ussh</literal> also requires that the certificate
|
||
contain a principal matching the user's username. The principals from
|
||
this list are in addition to those principals.
|
||
|
||
Mutually exclusive with <literal>authorizedPrincipalsFile</literal>.
|
||
'';
|
||
};
|
||
|
||
authorizedPrincipalsFile = mkOption {
|
||
default = null;
|
||
type = with types; nullOr path;
|
||
description = ''
|
||
Path to a list of principals; if the user presents a certificate with
|
||
one of these principals, then they will be authorized.
|
||
|
||
Note that <literal>pam-ussh</literal> also requires that the certificate
|
||
contain a principal matching the user's username. The principals from
|
||
this file are in addition to those principals.
|
||
|
||
Mutually exclusive with <literal>authorizedPrincipals</literal>.
|
||
'';
|
||
};
|
||
|
||
group = mkOption {
|
||
default = null;
|
||
type = with types; nullOr str;
|
||
description = ''
|
||
If set, then the authenticating user must be a member of this group
|
||
to use this module.
|
||
'';
|
||
};
|
||
|
||
control = mkOption {
|
||
default = "sufficient";
|
||
type = types.enum [ "required" "requisite" "sufficient" "optional" ];
|
||
description = ''
|
||
This option sets pam "control".
|
||
If you want to have multi factor authentication, use "required".
|
||
If you want to use the SSH certificate instead of the regular password,
|
||
use "sufficient".
|
||
|
||
Read
|
||
<citerefentry>
|
||
<refentrytitle>pam.conf</refentrytitle>
|
||
<manvolnum>5</manvolnum>
|
||
</citerefentry>
|
||
for better understanding of this option.
|
||
'';
|
||
};
|
||
};
|
||
|
||
security.pam.yubico = {
|
||
enable = mkOption {
|
||
default = false;
|
||
type = types.bool;
|
||
description = ''
|
||
Enables Yubico PAM (<literal>yubico-pam</literal>) module.
|
||
|
||
If set, users listed in
|
||
<filename>~/.yubico/authorized_yubikeys</filename>
|
||
are able to log in with the associated Yubikey tokens.
|
||
|
||
The file must have only one line:
|
||
<literal>username:yubikey_token_id1:yubikey_token_id2</literal>
|
||
More information can be found <link
|
||
xlink:href="https://developers.yubico.com/yubico-pam/">here</link>.
|
||
'';
|
||
};
|
||
control = mkOption {
|
||
default = "sufficient";
|
||
type = types.enum [ "required" "requisite" "sufficient" "optional" ];
|
||
description = ''
|
||
This option sets pam "control".
|
||
If you want to have multi factor authentication, use "required".
|
||
If you want to use Yubikey instead of regular password, use "sufficient".
|
||
|
||
Read
|
||
<citerefentry>
|
||
<refentrytitle>pam.conf</refentrytitle>
|
||
<manvolnum>5</manvolnum>
|
||
</citerefentry>
|
||
for better understanding of this option.
|
||
'';
|
||
};
|
||
id = mkOption {
|
||
example = "42";
|
||
type = types.str;
|
||
description = "client id";
|
||
};
|
||
|
||
debug = mkOption {
|
||
default = false;
|
||
type = types.bool;
|
||
description = ''
|
||
Debug output to stderr.
|
||
'';
|
||
};
|
||
mode = mkOption {
|
||
default = "client";
|
||
type = types.enum [ "client" "challenge-response" ];
|
||
description = ''
|
||
Mode of operation.
|
||
|
||
Use "client" for online validation with a YubiKey validation service such as
|
||
the YubiCloud.
|
||
|
||
Use "challenge-response" for offline validation using YubiKeys with HMAC-SHA-1
|
||
Challenge-Response configurations. See the man-page ykpamcfg(1) for further
|
||
details on how to configure offline Challenge-Response validation.
|
||
|
||
More information can be found <link
|
||
xlink:href="https://developers.yubico.com/yubico-pam/Authentication_Using_Challenge-Response.html">here</link>.
|
||
'';
|
||
};
|
||
challengeResponsePath = mkOption {
|
||
default = null;
|
||
type = types.nullOr types.path;
|
||
description = ''
|
||
If not null, set the path used by yubico pam module where the challenge expected response is stored.
|
||
|
||
More information can be found <link
|
||
xlink:href="https://developers.yubico.com/yubico-pam/Authentication_Using_Challenge-Response.html">here</link>.
|
||
'';
|
||
};
|
||
};
|
||
|
||
security.pam.enableEcryptfs = mkEnableOption "eCryptfs PAM module (mounting ecryptfs home directory on login)";
|
||
|
||
users.motd = mkOption {
|
||
default = null;
|
||
example = "Today is Sweetmorn, the 4th day of The Aftermath in the YOLD 3178.";
|
||
type = types.nullOr types.lines;
|
||
description = "Message of the day shown to users when they log in.";
|
||
};
|
||
|
||
};
|
||
|
||
|
||
###### implementation
|
||
|
||
config = {
|
||
|
||
environment.systemPackages =
|
||
# Include the PAM modules in the system path mostly for the manpages.
|
||
[ pkgs.pam ]
|
||
++ optional config.users.ldap.enable pam_ldap
|
||
++ optional config.services.sssd.enable pkgs.sssd
|
||
++ optionals config.krb5.enable [pam_krb5 pam_ccreds]
|
||
++ optionals config.security.pam.enableOTPW [ pkgs.otpw ]
|
||
++ optionals config.security.pam.oath.enable [ pkgs.oath-toolkit ]
|
||
++ optionals config.security.pam.p11.enable [ pkgs.pam_p11 ]
|
||
++ optionals config.security.pam.u2f.enable [ pkgs.pam_u2f ];
|
||
|
||
boot.supportedFilesystems = optionals config.security.pam.enableEcryptfs [ "ecryptfs" ];
|
||
|
||
security.wrappers = {
|
||
unix_chkpwd = {
|
||
setuid = true;
|
||
owner = "root";
|
||
group = "root";
|
||
source = "${pkgs.pam}/bin/unix_chkpwd";
|
||
};
|
||
};
|
||
|
||
environment.etc = mapAttrs' makePAMService config.security.pam.services;
|
||
|
||
security.pam.services =
|
||
{ other.text =
|
||
''
|
||
auth required pam_warn.so
|
||
auth required pam_deny.so
|
||
account required pam_warn.so
|
||
account required pam_deny.so
|
||
password required pam_warn.so
|
||
password required pam_deny.so
|
||
session required pam_warn.so
|
||
session required pam_deny.so
|
||
'';
|
||
|
||
# Most of these should be moved to specific modules.
|
||
i3lock = {};
|
||
i3lock-color = {};
|
||
vlock = {};
|
||
xlock = {};
|
||
xscreensaver = {};
|
||
|
||
runuser = { rootOK = true; unixAuth = false; setEnvironment = false; };
|
||
|
||
/* FIXME: should runuser -l start a systemd session? Currently
|
||
it complains "Cannot create session: Already running in a
|
||
session". */
|
||
runuser-l = { rootOK = true; unixAuth = false; };
|
||
};
|
||
|
||
security.apparmor.includes."abstractions/pam" = let
|
||
isEnabled = test: fold or false (map test (attrValues config.security.pam.services));
|
||
in
|
||
lib.concatMapStrings
|
||
(name: "r ${config.environment.etc."pam.d/${name}".source},\n")
|
||
(attrNames config.security.pam.services) +
|
||
''
|
||
mr ${getLib pkgs.pam}/lib/security/pam_filter/*,
|
||
mr ${getLib pkgs.pam}/lib/security/pam_*.so,
|
||
r ${getLib pkgs.pam}/lib/security/,
|
||
'' +
|
||
optionalString use_ldap ''
|
||
mr ${pam_ldap}/lib/security/pam_ldap.so,
|
||
'' +
|
||
optionalString config.services.sssd.enable ''
|
||
mr ${pkgs.sssd}/lib/security/pam_sss.so,
|
||
'' +
|
||
optionalString config.krb5.enable ''
|
||
mr ${pam_krb5}/lib/security/pam_krb5.so,
|
||
mr ${pam_ccreds}/lib/security/pam_ccreds.so,
|
||
'' +
|
||
optionalString (isEnabled (cfg: cfg.googleOsLoginAccountVerification)) ''
|
||
mr ${pkgs.google-guest-oslogin}/lib/security/pam_oslogin_login.so,
|
||
mr ${pkgs.google-guest-oslogin}/lib/security/pam_oslogin_admin.so,
|
||
'' +
|
||
optionalString (isEnabled (cfg: cfg.googleOsLoginAuthentication)) ''
|
||
mr ${pkgs.google-guest-oslogin}/lib/security/pam_oslogin_login.so,
|
||
'' +
|
||
optionalString (config.security.pam.enableSSHAgentAuth
|
||
&& isEnabled (cfg: cfg.sshAgentAuth)) ''
|
||
mr ${pkgs.pam_ssh_agent_auth}/libexec/pam_ssh_agent_auth.so,
|
||
'' +
|
||
optionalString (isEnabled (cfg: cfg.fprintAuth)) ''
|
||
mr ${pkgs.fprintd}/lib/security/pam_fprintd.so,
|
||
'' +
|
||
optionalString (isEnabled (cfg: cfg.u2fAuth)) ''
|
||
mr ${pkgs.pam_u2f}/lib/security/pam_u2f.so,
|
||
'' +
|
||
optionalString (isEnabled (cfg: cfg.usbAuth)) ''
|
||
mr ${pkgs.pam_usb}/lib/security/pam_usb.so,
|
||
'' +
|
||
optionalString (isEnabled (cfg: cfg.usshAuth)) ''
|
||
mr ${pkgs.pam_ussh}/lib/security/pam_ussh.so,
|
||
'' +
|
||
optionalString (isEnabled (cfg: cfg.oathAuth)) ''
|
||
"mr ${pkgs.oath-toolkit}/lib/security/pam_oath.so,
|
||
'' +
|
||
optionalString (isEnabled (cfg: cfg.yubicoAuth)) ''
|
||
mr ${pkgs.yubico-pam}/lib/security/pam_yubico.so,
|
||
'' +
|
||
optionalString (isEnabled (cfg: cfg.duoSecurity.enable)) ''
|
||
mr ${pkgs.duo-unix}/lib/security/pam_duo.so,
|
||
'' +
|
||
optionalString (isEnabled (cfg: cfg.otpwAuth)) ''
|
||
mr ${pkgs.otpw}/lib/security/pam_otpw.so,
|
||
'' +
|
||
optionalString config.security.pam.enableEcryptfs ''
|
||
mr ${pkgs.ecryptfs}/lib/security/pam_ecryptfs.so,
|
||
'' +
|
||
optionalString (isEnabled (cfg: cfg.pamMount)) ''
|
||
mr ${pkgs.pam_mount}/lib/security/pam_mount.so,
|
||
'' +
|
||
optionalString (isEnabled (cfg: cfg.enableGnomeKeyring)) ''
|
||
mr ${pkgs.gnome3.gnome-keyring}/lib/security/pam_gnome_keyring.so,
|
||
'' +
|
||
optionalString (isEnabled (cfg: cfg.startSession)) ''
|
||
mr ${config.systemd.package}/lib/security/pam_systemd.so,
|
||
'' +
|
||
optionalString (isEnabled (cfg: cfg.enableAppArmor)
|
||
&& config.security.apparmor.enable) ''
|
||
mr ${pkgs.apparmor-pam}/lib/security/pam_apparmor.so,
|
||
'' +
|
||
optionalString (isEnabled (cfg: cfg.enableKwallet)) ''
|
||
mr ${pkgs.plasma5Packages.kwallet-pam}/lib/security/pam_kwallet5.so,
|
||
'' +
|
||
optionalString config.virtualisation.lxc.lxcfs.enable ''
|
||
mr ${pkgs.lxc}/lib/security/pam_cgfs.so
|
||
'';
|
||
};
|
||
|
||
}
|